"Simultaneously, 12 of these 16 cards correspond to a particular 30° segment of the zodiac:the first two decanates (i.e., the first 20°) of one sign, of the element to which the card’s suit corresponds,and the last decanate (or 10°) of the preceding sign, which is of a contrary element."

Who figured this out?

Was the 20 degree/10 degree theory worked out before Court de Gebelin started pairing the Hebrew alphabet with the Trumps?